题目内容
| 12.56-6.64-3.36 | 45.5-(0.98+5.5) |
| 6+7.94+6.4 | 3.75×4.8+62.5×0.48. |
(1)12.56-6.64-3.36,
=12.56-(6.64+3.36),
=12.56-10,
=2.56;
(2)45.5-(0.98+5.5),
=45.5-6.48,
=39.02;
(3)6+7.94+6.4,
=13.94+6.4,
=20.34;
(4)3.75×4.8+62.5×0.48,
=3.75×4.8+6.25×4.8,
=(3.75+6.25)×4.8,
=10×4.8,
=48.
=12.56-(6.64+3.36),
=12.56-10,
=2.56;
(2)45.5-(0.98+5.5),
=45.5-6.48,
=39.02;
(3)6+7.94+6.4,
=13.94+6.4,
=20.34;
(4)3.75×4.8+62.5×0.48,
=3.75×4.8+6.25×4.8,
=(3.75+6.25)×4.8,
=10×4.8,
=48.
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